U.S.-based airlines reported no noticeable increase in ticket cancellations Sunday after the United States and Britain warned their citizens of an increased risk of terror attacks in Europe.
But they also said it was perhaps too early to tell what the impact would be of the warnings issued Sunday.
The U.S. State Department put out an alert for American citizens traveling in Europe, without singling out any country. The British government updated its travel advice for citizens going to France and Germany, raising the terrorism threat level to "high" from "general."
Delta Air Lines spokesman Carlos Santos, said, "Our flights are operating their regular schedule, and operations are normal."
Santos said it was too early to know if customers would be canceling flight plans due to the alert. "I don't want to speculate on what passengers are going to do. It is hard to say," he said.
In Dallas-Fort Worth, an American Airlines spokesman said the airline had not seen any surge in cancellations related to the State Department notice.
"We are not seeing much of anything on this at this point," he said.
Europe is worried about how reports of the threats might affect tourism.
The U.S. alert falls short of a more severe one in which the State Department may have warned citizens against traveling to Europe. Instead, the alert urges them to take precautions when they do travel.
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